From d37c983a778d53f991999e6b2b309a07a9bca0b0 Mon Sep 17 00:00:00 2001
From: "Kartik K. Agaram" <vc@akkartik.com>
Date: Wed, 21 Mar 2018 21:52:53 -0700
Subject: 4231

---
 076continuation.cc | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/076continuation.cc b/076continuation.cc
index 50e4f637..fd51869d 100644
--- a/076continuation.cc
+++ b/076continuation.cc
@@ -191,6 +191,9 @@ RETURN_CONTINUATION_UNTIL_MARK,
 Recipe_ordinal["return-continuation-until-mark"] = RETURN_CONTINUATION_UNTIL_MARK;
 :(before "End Primitive Recipe Checks")
 case RETURN_CONTINUATION_UNTIL_MARK: {
+  if (inst.ingredients.empty()) {
+    raise << maybe(get(Recipe, r).name) << "'" << to_original_string(inst) << "' requires at least one ingredient: a mark tag (number)\n" << end();
+  }
   break;
 }
 :(before "End Primitive Recipe Implementations")
-- 
cgit 1.4.1-2-gfad0